Basic wasm skp debugger unit test

Bug: skia:
Change-Id: I91a3f40279724a29d759229c012be864d8a02edd
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/197765
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Nathaniel Nifong <nifong@google.com>

experimental/wasm-skp-debugger/karma.conf.js

@@ -0,0 +1,73 @@
+const isDocker = require('is-docker')();
+
+module.exports = function(config) {
+  // Set the default values to be what are needed when testing the
+  // WebAssembly build locally.
+  let cfg = {
+    // frameworks to use
+    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
+    frameworks: ['jasmine'],
+
+    // list of files / patterns to load in the browser
+    files: [
+      { pattern: 'debugger/bin/debugger.wasm', included:false, served:true},
+      { pattern: 'debugger/bin/debugger.data', included:false, served:true},
+      '../../modules/pathkit/tests/testReporter.js',
+      'debugger/bin/debugger.js',
+      'tests/*.spec.js'
+    ],
+
+    proxies: {
+      '/debugger/': '/base/debugger/bin/',
+    },
+
+    // test results reporter to use
+    // possible values: 'dots', 'progress'
+    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
+    reporters: ['progress'],
+
+    // web server port
+    port: 4444,
+
+    // enable / disable colors in the output (reporters and logs)
+    colors: true,
+
+    // level of logging
+    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
+    logLevel: config.LOG_INFO,
+
+    // enable / disable watching file and executing tests whenever any file changes
+    autoWatch: true,
+
+    browserDisconnectTimeout: 15000,
+    browserNoActivityTimeout: 15000,
+
+    // start these browsers
+    browsers: ['Chrome'],
+
+    // Continuous Integration mode
+    // if true, Karma captures browsers, runs the tests and exits
+    singleRun: false,
+
+    // Concurrency level
+    // how many browser should be started simultaneous
+    concurrency: Infinity,
+  };
+
+  if (isDocker) {
+    // See https://hackernoon.com/running-karma-tests-with-headless-chrome-inside-docker-ae4aceb06ed3
+    cfg.browsers = ['ChromeHeadlessNoSandbox'],
+    cfg.customLaunchers = {
+        ChromeHeadlessNoSandbox: {
+            base: 'ChromeHeadless',
+            flags: [
+            // Without this flag, we see an error:
+            // Failed to move to new namespace: PID namespaces supported, Network namespace supported, but failed: errno = Operation not permitted
+                '--no-sandbox'
+            ],
+        },
+    };
+  }
+
+  config.set(cfg);
+}

experimental/wasm-skp-debugger/package.json

@@ -0,0 +1,21 @@
+{
+  "name": "debugger-local",
+  "version": "0.0.0",
+  "description": "private",
+  "private": true,
+  "main": "index.js",
+  "dependencies": {},
+  "devDependencies": {
+    "is-docker": "~1.1.0",
+    "jasmine-core": "~3.1.0",
+    "karma": "~3.0.0",
+    "karma-chrome-launcher": "~2.2.0",
+    "karma-jasmine": "~1.1.2",
+    "requirejs": "~2.3.5"
+  },
+  "scripts": {
+    "test": "make test-continuous"
+  },
+  "author": "",
+  "license": "BSD-3-Clause"
+}

experimental/wasm-skp-debugger/tests/startup.spec.js

@@ -0,0 +1,35 @@
+// The increased timeout is especially needed with larger binaries
+// like in the debug/gpu build
+jasmine.DEFAULT_TIMEOUT_INTERVAL = 20000;
+
+describe('Debugger\'s Startup Behavior', function() {
+    // Note, don't try to print the CanvasKit object - it can cause Karma/Jasmine to lock up.
+    var Debugger = null;
+    const LoadDebugger = new Promise(function(resolve, reject) {
+        if (Debugger) {
+            resolve();
+        } else {
+            DebuggerInit({
+                locateFile: (file) => '/debugger/'+file,
+            }).ready().then((_Debugger) => {
+                Debugger = _Debugger;
+                resolve();
+            });
+        }
+    });
+
+    let container = document.createElement('div');
+    document.body.appendChild(container);
+    container.innerHTML = `<canvas id=debugger_view width=720 height=1280></canvas>`;
+
+    it('can load the built in skp sample', function(done) {
+        LoadDebugger.then(catchException(done, () => {
+            const surface = Debugger.MakeSWCanvasSurface('debugger_view');
+            const player = new Debugger.SkpDebugPlayer();
+            player.loadSkp();
+            player.drawTo(surface, 789); // number of commands in sample file
+            surface.flush();
+            done();
+        }));
+    });
+});